Jewelry factories say that natural sapphires usually have uneven color tones, with most having straight growth patterns. The artificially synthesized blue gemstones have a consistent color tone, and their growth patterns are arc-shaped bands, usually indicating the presence of breadcrumb like or bead like bubbles within the body. Natural sapphires also have significant dichroism, appearing dark blue from one perspective and dark blue from another perspective. The color appearance of other crystals is different from that of natural sapphire, which can be distinguished. In addition, the simplest method can be strength measurement. Natural sapphires can carve marks on topaz, while other sapphires cannot carve marks on topaz. Therefore, when choosing jewelry, if there is no instrument or equipment nearby, only a piece of topaz is needed, which can sometimes solve some problems.

Diamonds are the strongest component among natural ingredients. Diamonds can depict all other crystals, but all other crystals depict motionless diamonds. It can also be characterized by a "standardized hardness tester", and any strength below 9 degrees is a fake diamond. Diamonds also have oil solubility. If a signature pen is used to draw a line on the surface of the diamond, it forms a continuous parallel line, while other crystals exhibit intermittent interruption lines. The above methods have certain practical value in evaluating diamonds. It can also be observed under a 10x high-power magnifying glass. Under a 10x high-power magnifying glass, most diamonds show defects, with triangular growth patterns, and the surface of the diamond has "fire" lights of colors such as "red, orange, and blue". Radiant in all directions. The most accurate and reliable method is to use a "thermal conductivity meter" to measure heat transfer data information to distinguish between real and fake diamonds, but the price comparison of a "thermal conductivity meter" is expensive.